WPML support of user Input fields on settings page

Hi Marco,

I am trying to make the user input fields of the tabs on the Tabify settings page translatable with WPML, so that I can register the Input text as translation strings. I wonder if you can help to understand this whole process, since I fail to register the fields.

So f.e. i have a CPT “Product” with a tab like “Produkt Description” and I want to translate it to the German “Produktbeschreibung”.

WPML offers the posibility to register and output translations from plugin input fields. Here is the link to the WPML site: Translating user input texts from plugins and themes
.

Here it says by using following code, I can register those texts from the input fields.
do_action( 'wpml_register_single_string', string $context, string $name, string $value )

F.e. for a custom widget it would look like that:

function update($new_instance, $old_instance){
    $instance = $old_instance;
    $instance['custom_input']   = strip_tags($new_instance['custom_input']);

    //WMPL
    /**
     * register strings for translation
     */
    do_action( 'wpml_register_single_string', 'Widgets', 'Custom Widget - input field', $instance['custom_input'] );
    //WMPL

    return $instance;
}

I tried to register my first tab like that, but it did not work:

function update($new_instance, $old_instance){
    $instance = $old_instance;

    $instance['tabify[posttypes][product][tabs][0][title]']   = strip_tags($new_instance['tabify[posttypes][product][tabs][0][title]']);

    //WMPL
    /**
     * register strings for translation
     */
    do_action( 'wpml_register_single_string', 'Tabify edit screen', 'Tab 1', $instance['tabify[posttypes][product][tabs][0][title]'] );

    //WMPL

    return $instance;}

In this WPML document it says I have to apply filters to make a things happen. I wonder what that means in the context of your plugin. And if that is the reason for why I do not get the input field registered.

Any help would be much appriciated. Thank you in advance.

Jan-Philipp

https://www.ads-software.com/plugins/tabify-edit-screen/